Experimental research on the impact of the application of fins on absorber surface on thermal efficiency of passive solar air collector

In this paper an experimental results on passive solar air collectors are presented. An impact of application of waveform fins on the absorber surface on thermal efficiency was investigated. The results were compared with experiment on passive solar air collector with flat absorber surface. The experiment was conducted under steady state artificial radiation conditions in a laboratory environment. This enabled the acquisition of differences in flow and thermal parameters of the two designs. At the experimental stand following parameters were measured: irradiance, air temperature at inlet and outlet to the collector, mean air velocity at the inlet duct of the collector. The impact of irradiance on temperature increase, volumetric flow rate and thermal efficiency is shown. It was established that thermal efficiency of the collector with expanded absorber surface in form of fins is 10-15% higher than the efficiency of flat absorber collector.

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Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).